So how do you start a conversation?
Hi. How are you? / Hello. How are you?
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Hi. How ya doin'? 
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Hi. How's it goin'?
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How've you been? 
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Hi. How goes it? 
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Hi. How are things?
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Hi. What's happening?
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Hi. What's new?
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Hi. What've you been up to lately?
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S'up, dude?
/
Yo!